How much would it cost to fix/repair a cracked bumper? PLEASE HELP.?

Okay, so we got about 30 inches of snow on Sunday night. I shoveled my driveway and there was two big piles next to each side of the driveway at the end where you pull in. My Mom let me borrow the car and I came back and tried to pull in (it's a pretty small car so I figured it would be no problem) and I got stuck. There was no way I could reverse cause I live on a main road and about fifty cars were behind me waiting, and so I pushed forward and some snow flew and the tires skidded but I got through. I get out, and my mom's plastic bumper's cracked right above the driver's side tire. I'm freaking out. I either need to have it fixed or have a plan of how to get it fixed by the time my Mom comes home from work. I know NOTHING about cars. I wouldn't know how to do it myself. Is it cheap to fix a crack in the front bumper? I only have about $80 on me. Is there something I can buy at the store to do it? Like duct tape or super glue. I have no idea. Please, anyone. I don't have a clue what to do. Thanks so much for your help.